CN105575745B - A kind of half period interlocks cosine end face grid slow-wave structure - Google Patents
A kind of half period interlocks cosine end face grid slow-wave structure Download PDFInfo
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- CN105575745B CN105575745B CN201511018322.XA CN201511018322A CN105575745B CN 105575745 B CN105575745 B CN 105575745B CN 201511018322 A CN201511018322 A CN 201511018322A CN 105575745 B CN105575745 B CN 105575745B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
- H01J23/28—Interdigital slow-wave structures; Adjustment therefor
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Abstract
A kind of present invention half period interlocks cosine end face grid slow-wave structure.The slow-wave structure includes housing, it is formed in multiple second gate bodies of the inner cavity first on the second opposite side of upper multiple first grid bodies and while being formed in inner cavity with first, first grid body is staggered with second gate body along slow-wave structure axis, electron beam channel is formed between first grid body and second gate body, it is characterized in that, each first grid body and second gate body have cosine profile in electron beam channel side respectively perpendicular to the end face of axis.Present invention reduces the high-frequency loss of slow-wave structure, increase that cold belt is wide, suitable for the raising of THz devices efficiency and bandwidth.
Description
Technical field
The invention belongs to microwave vacuum field of electronic devices, and in particular to interlock cosine end face grid slow wave to a kind of half period
Structure.
Background technology
Slow-wave structure is mainly used in travelling-wave type microwave vacuum electronic device, can also be used as resonator for extending interaction
Type standing wave device, effect are to reduce the phase velocity for transmitting electromagnetic wave wherein, are allowed to synchronous with electronics note holding, to obtain note wave
Between effective interaction, belong to the core of microwave vacuum electronic device.
As frequency is increased to terahertz wave band, most common slow-wave structure is made due to the technical barriers such as process, radiate
Used time is very restricted, and therefore, the exploration work of new type slow wave structure has obtained extensive attention.At present, with the U.S. plus
The half period that researcher based on state university Davis branch school proposes double grid slow-wave structure of interlocking is a kind of important slow wave knot
Structure as depicted in figs. 1 and 2, is loaded with two rows of rectangle grid 2, rectangle grid are handed over by the half period on two broadsides in rectangular waveguide 1
Mistake rearranges periodic structure, and electron beam channel 3 is formed between grid end face, and wherein a and b represent that the broadside length of waveguide and narrow side are long,
The period of grid is p, and rectangle gate length is consistent with the long a of waveguide broadside, grid width and high respectively w and h, region shown in section line
Represent metal.It is intrinsic electronics note the advantages of this rectangle interlocks double grid slow-wave structure compared with circular helical-line slow-wave structure
Channel, processing technology and simple for assembly process reduce processing complexity and cost.The coupled impedance of this slow-wave structure and cold
Bandwidth is moderate, has the advantages that high working frequency and high-power, but there are high-frequency loss it is high the characteristics of.It is low in Terahertz frequency range
Drain performance is particularly significant, this is because high-frequency means that high-frequency loss is larger, and surface roughness increasingly connects at this time
Nearly skin depth, increases high-frequency loss to a certain extent.In recent years, many novel half periods interlock double grid slow-wave structure
It proposes both for changing loading grid along the pattern of waveguide axial direction section to further improving the research of high frequency characteristics.Publication number
A kind of Chinese utility model patent for CN203536356U, entitled " T shapes interlock double grid slow-wave device " disclose it is a kind of will
Rectangle grid body is improved to the slow-wave device of T-shaped grid body, as shown in figure 3, being imitated by the tip of " grid cover " two side flange in the electric field
Should, the performance of device is improved.
Invention content
It is an object of the present invention to one kind is provided perpendicular to the profile in the grid body end face of waveguide axis by optimizing
The staggeredly double grid slow-wave structure of high-frequency loss and the bandwidth expanded with reduction.
In order to achieve the above objectives, the present invention provides a kind of interlocks the slow wave of cosine end face grid body slow-wave structure with the half period
Device.There is slow-wave structure half period for being loaded on two broadsides of rectangular waveguide to be staggered the periodic structure of grid body,
Electron beam channel is formed with respect between grid body.Grid body has in electron beam channel side more than the monocycle perpendicular to the end face of waveguide axis
String whee is wide, and distance of the cosine profile vertex away from corresponding broadside is grid body height, and the amplitude of cosine profile is less than the one of grid body height
Half.Distance of the cosine profile both ends apart from cosine profile vertex is twice of cosine amplitude.In other words, with the square of the prior art
Shape end face grid body is compared, scheme according to the present invention by rectangle grid body be improved to electron beam channel side have cosine profile or
It is improved to the grid body in single cosine period.Those skilled in the art can select rational slow wave according to the design parameter of slow-wave structure
Feature size changes size particularly the grid body height and cosine amplitude of grid body end face cosine profile, to adjust Working mould
The magnetic distribution of formula keeps electric field distribution still to concentrate on the region of note wave interaction space, expands the magnetic field for generating surface current
Distributed areas.
Specifically, according to an aspect of the present invention, a kind of double grid slow-wave structure of interlocking is provided, including housing, is formed in
Multiple second gate bodies of the inner cavity first on the second opposite side of upper multiple first grid bodies and while being formed in first, the first grid
Body is staggered with second gate body along slow-wave structure axis, and electron beam channel, institute are formed between first grid body and second gate body
State each first grid body and second gate body has cosine profile in electron beam channel side respectively perpendicular to the end face of axis.
Preferably, the centre-to-centre spacing between the centre-to-centre spacing between adjacent first grid body and adjacent second gate body is respectively a week
Phase length.
Preferably, the centre-to-centre spacing between adjacent first grid body and second gate body is half cycle length.
Preferably, described first while and opposite side that second while is the housing rectangular inner cavity length of side length.
Preferably, the multiple first grid body and multiple second gate bodies are identically shaped and sized.
Preferably, each first grid body and second gate body have monocycle cosine profile in electron beam channel side respectively.
Preferably, the cosine amplitude of the cosine profile is less than or equal to the half of grid body height.
Preferably, distance of the both ends away from its culminating point of the cosine profile is twice of cosine amplitude.
According to another aspect of the present invention, a kind of double grid slow-wave device that interlocks is provided, there is slow-wave structure as described above.
Slow-wave device according to the present invention suitable for Terahertz frequency domain, has the high-frequency loss reduced, and increased cold belt is wide
With improved dispersion characteristics.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 shows the staggeredly double grid slow-wave device model schematic of the prior art.
Fig. 2 shows the periodic structure sectional views of Fig. 1 institutes representation model.
Fig. 3 shows that the T shapes of the prior art are interlocked double grid slow-wave device model schematic.
Fig. 4 shows staggeredly double grid slow-wave device schematic diagram according to embodiments of the present invention.
Fig. 5 shows the staggeredly double grid slow-wave device periodic structure sectional view of Fig. 4.
Fig. 6 is to be interlocked double grid slow-wave structure dispersion characteristic curve according to the half period of present example and comparative example.
Fig. 7 be according to present example compared with the half period of comparative example interlocks double grid slow-wave structure axis coupled impedance.
Fig. 8 be according to present example compared with the half period of comparative example interlocks double grid slow-wave structure high-frequency loss.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
Fig. 4 and Fig. 5 shows that a kind of half period according to embodiments of the present invention interlocks cosine end face grid slow-wave structure, the slow wave
Structure includes rectangular housing, inner cavity and equidistant multiple cosine end face grid bodies on broadside and lower broadside on inner cavity, on
Electron beam channel is formed between broadside grid body and lower broadside grid body.It is preferred that multiple grid shape is identical with size, phase up and down
Adjacent grid body is along slow-wave structure axis direction z to dislocation half period, i.e., the centre-to-centre spacing between adjacent two grid body on same broadside
Length for a cycle.According to an embodiment of the invention, each grid body perpendicular to the end face x of axis in electron beam channel side
With cosine profile.In Fig. 5, a represents that the broadside of rectangular waveguide is long, and b is that the narrow side of waveguide is long, upper broadside grid body and lower broadside grid
Body is p along the waveguide axis staggered geometry period, and grid body width is w, and grid body height, that is, cosine profile culminating point is away from it
The height of place broadside is h, and cosine amplitude is Ac.It is preferred that between centre-to-centre spacing and adjacent second gate body between adjacent first grid body
Centre-to-centre spacing be respectively a cycle length p.It is preferred that the centre-to-centre spacing between adjacent first grid body and second gate body is half period
Length p/2.As Ac=0, interlock rectangular end face double grid slow-wave structure for the conventional half period, when meeting h/2 >=Ac>It is root when 0
Half period according to the present invention interlocks cosine end face double grid slow-wave structure.Distance of the cosine profile both ends away from its culminating point is cosine
Twice of amplitude Ac.When cosine amplitude Ac is less than the half of grid body height, grid body can be regarded to rectangle grid body as logical in electronics note
Road side is formed with cosine profile.When cosine amplitude Ac is equal to the half of grid body height, grid body has monocycle cosine profile.It is logical
The magnetic distribution for the whole operating mode of size adjustable for changing grid body end face cosine profile is crossed, electric field distribution is kept still to concentrate on note
The region of wave interaction space expands the distributed areas in the magnetic field for generating surface current, obtains required performance.
Below by taking the staggeredly double grid slow-wave device for being operated in G-band such as 170GHz-260GHz as an example, basis is illustrated
The slow-wave structure and its performance of the present invention.
Comparative example
A kind of half period interlocks rectangular end face grid slow-wave structure, and concrete structure size is as follows, unit mm：Rectangular waveguide is wide
Length of side a=0.68, Narrow Wall of Waveguide side length b=0.64, geometry period p=0.4, the rectangle wide w=0.1 of grid body set along broadside, grid
The high h=0.26 of body, cosine amplitude A c are 0.The rectangular end face grid slow-wave structure is simulated using 3 D electromagnetic software, is calculated
Dispersion curve, axis coupled impedance and high-frequency loss are obtained, shown in analog result such as Fig. 6,7 and 8.
Example 1
A kind of half period according to the present invention interlocks cosine end face grid slow-wave structure, and concrete scheme structure size is as follows, single
Position is mm：The long a=0.68 of rectangular waveguide broadside, Narrow Wall of Waveguide side length b=0.64, geometry period p=0.4, the wide w=of cosine grid body
0.1, the high h=0.26 of grid body, the amplitude A c of cosine profile is 0.005.Using 3 D electromagnetic software to the slow-wave structure of the example
It is simulated, dispersion curve, axis coupled impedance and high-frequency loss is calculated, shown in analog result such as Fig. 6,7 and 8.
Example 2
A kind of half period according to the present invention interlocks cosine end face grid slow-wave structure, and concrete scheme structure size is as follows, single
Position is mm：The long a=0.68 of waveguide broadside, Narrow Wall of Waveguide side length b=0.64, geometry period p=0.4, the wide w=0.1 of cosine grid body, grid
The high h=0.26 of body, the amplitude A c of cosine profile is 0.01.It is staggeredly remaining to a kind of half period of the present invention using 3 D electromagnetic software
String end face grid slow-wave structure is simulated, and dispersion curve, axis coupled impedance and high-frequency loss is calculated, analog result is as schemed
Shown in 6,7 and 8.
The analog result of Fig. 6 dispersion curves is shown, compared with the rectangular end face half period interlocks double grid slow-wave structure, according to this
The half period of invention interlocks cosine end face double grid slow-wave structure fundamental wave lower limiting frequency and upper cut off frequency simultaneously declines, lower cut-off
Frequency declines more, the wide increase of corresponding cold belt, and the stronger cold belt of amplitude for loading cosine profile is wide.Fig. 7 central axes coupling
The analog result for closing impedance show that the comparison rectangular end face half period interlocks double grid slow-wave structure, and the half period interlocks cosine end face pair
Grid slow-wave structure coupled impedance overall variation is little, but has reduction.Due to the value of radical sign three times of gain parameter and coupled impedance into
Direct ratio, therefore influence of the reduction of coupled impedance to gain and efficiency can be ignored.The analog result of Fig. 8 high-frequency losses
It has been shown that, compared with the rectangular end face half period interlocks double grid slow-wave structure, the half period interlocks cosine end face grid slow-wave structure high frequency damage
Consumption overall variation is small, and the high-frequency loss in figure is copper metal, and conductivity is set as 5.8e7S/m, passes through slow wave during erg-ten energy
The normalization loss power value of structure, the numerical value are acquired by quality factor q and angular frequency, and with comparative example slow-wave structure week
Standard is normalized as 1 in loss power value when phase phase shift is 360 degree.Cosine end face grid are loaded to know from experience so that high frequency
Loss becomes smaller, and the stronger effect of optimization of amplitude for loading cosine profile is more apparent.These results illustrate with slow wave according to the present invention
Structure can realize better efficiency and bandwidth for the microwave electron tube of core.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention for those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the row of protection scope of the present invention.
Claims (8)
- The double grid slow-wave structure 1. one kind is interlocked, including housing, the multiple first grid bodies being formed on the first side of inner cavity and is formed in Inner cavity with first at opposite second on multiple second gate bodies, first grid body interlocks with second gate body along slow-wave structure axis Arrangement, electron beam channel is formed between first grid body and second gate body,It is characterized in that,Each first grid body and second gate body have cosine profile in electron beam channel side respectively perpendicular to the end face of axis, andDistance of the both ends of cosine profile away from its culminating point is twice of cosine amplitude.
- 2. staggeredly double grid slow-wave structure as described in claim 1, which is characterized in that centre-to-centre spacing between adjacent first grid body and Centre-to-centre spacing between adjacent second gate body is respectively a cycle length.
- 3. double grid slow-wave structure of interlocking as described in claim 1, which is characterized in that between adjacent first grid body and second gate body Centre-to-centre spacing be half cycle length.
- 4. staggeredly double grid slow-wave structure as described in claim 1, which is characterized in that described first while and second while be the shell The opposite side of body rectangular inner cavity length of side length.
- 5. double grid slow-wave structure of interlocking as described in claim 1, which is characterized in that the multiple first grid body and multiple second Grid body is identically shaped and sized.
- 6. double grid slow-wave structure of interlocking as described in claim 1, which is characterized in that each first grid body and second gate body point Not there is monocycle cosine profile in electron beam channel side.
- 7. double grid slow-wave structure of interlocking as described in claim 1, which is characterized in that the cosine amplitude of the cosine profile is less than Equal to the half of grid body height.
- The double grid slow-wave device 8. one kind is interlocked, including double grid slow-wave structure of interlocking as described in claim 1.
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| CN108878237B (en) * | 2018-07-06 | 2020-06-19 | 电子科技大学 | Structure and method for improving double grating coupling |
| CN110729160B (en) * | 2019-10-22 | 2020-10-23 | 电子科技大学 | Double-channel staggered gate slow wave structure |
| CN110752131B (en) * | 2019-11-12 | 2020-09-01 | 电子科技大学 | Multi-electron-beam-channel slow-wave structure with trigonometric function profile |
| CN111128644A (en) * | 2019-12-30 | 2020-05-08 | 电子科技大学 | High-frequency structure of all-metal double-row gradient gate |
| CN113113279B (en) * | 2021-04-15 | 2022-03-25 | 电子科技大学 | Cosine grid loading sine-like waveguide slow wave structure |
| CN115295378A (en) * | 2022-09-07 | 2022-11-04 | 电子科技大学 | All-metal slow wave structure with wide bandwidth |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201540945U (en) * | 2009-07-22 | 2010-08-04 | 电子科技大学 | Serpentine groove guide slow-wave line |
| CN202111052U (en) * | 2010-12-13 | 2012-01-11 | 电子科技大学 | Fluctuant waveguide slow wave structure |
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| JP2012185994A (en) * | 2011-03-04 | 2012-09-27 | Ube Material Industries Ltd | Front plate for plasma display panel |
| US9202660B2 (en) * | 2013-03-13 | 2015-12-01 | Teledyne Wireless, Llc | Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201540945U (en) * | 2009-07-22 | 2010-08-04 | 电子科技大学 | Serpentine groove guide slow-wave line |
| CN202111052U (en) * | 2010-12-13 | 2012-01-11 | 电子科技大学 | Fluctuant waveguide slow wave structure |
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